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Dreaded Red Battery Icon - How I Fixed It

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SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

Dreaded Red Battery Icon - How I Fixed It

 
Old 04-08-2019, 11:14 PM
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Anyone have an idea where this part goes, somewhere near the consumer battery? Any ideas would be greatly appreciated.... Thanks!
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Old 04-08-2019, 11:15 PM
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Originally Posted by julrick001 View Post

where does it go?
Well, apparently I was in too much of a hurry to put everything back together when replacing the consumer battery ...... it appears I left something out, found this next to the old battery yesterday... but don't remember where it goes?
Anyone have an idea where this part goes, somewhere near the consumer battery? Any ideas would be greatly appreciated.... Thanks
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Old 04-09-2019, 12:27 AM
  #78  
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I don't think I have it in my car. Do you see a part number on it? Did you buy your car used? I guess somebody left it in your trunk which actually didn't belong there.
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Old 04-20-2019, 02:51 PM
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CPDay- thank you for all the research and time you spent on this issue. My question is simple, did you disconnect both batteries and install an OBD Memory Saver when you disconnected the fuses to bench test?
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Old 04-21-2019, 10:41 AM
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Originally Posted by sgort2 View Post
CPDay- thank you for all the research and time you spent on this issue. My question is simple, did you disconnect both batteries and install an OBD Memory Saver when you disconnected the fuses to bench test?
sgort2- Good question. I know for certain that I did disconnect both batteries and I did not use any type of memory saver. I had to reset the convenience items (seat positions, window close position, etc) afterward. I don't recall losing any OBD data, but that was some years ago and my recollection could be wrong. I have thought that the OBD data was non-volatile. Perhaps someone else will chime in re this question.
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Old 04-21-2019, 12:44 PM
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They only reason you would want to disconnect both batteries is if you wanted to test the fuse when it's still in the circuit. Not advisable though. Pull them out and test them when you know for sure no load is on the fuse.
I didn't use a memory saver and everything worked just fine after testing the fuses but remember this is to the best of my knowledge. Maybe something was lost but definitely not something major or I would've had noticed it.
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Old 05-02-2019, 01:42 PM
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Thanks for all of the great info everyone, I just put a brand new battery in the trunk, to no avail. Looks like I’ll be digging out the fuses when I have a free day. Until then I’ll drive the car and see if the “red” goes away. I’m sure that would be way to easy.
Ill let you know what happens, one quick question that you guys might know off hand, my mechanic has a super scanner, is this something that can be checked with it?
Thanks again for all of the great info!
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Old 05-02-2019, 08:24 PM
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FWIW, and I admit I didn't read every last post, so I don't know if this has been mentioned, but Advance Auto carries the starter battery. The battery size is V4 and it is identical to the factory battery except it says AutoCraft Gold instead of Mercedes Benz. Even the manufacturer's stamp in the side of the battery was identical. $165, but you usually get 15% or 20% off when ordering on-line and picking up in the store.


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Old 05-02-2019, 10:31 PM
  #84  
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Yep - I have that same Advance Auto battery. I've been very happy with all the batteries I've bought from them over the years.
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Old 05-03-2019, 01:11 AM
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O’Reilly Super Start Extreme Group Size V4 Top Post Battery Part # V4EXTJ Line: SSB, is also a direct replacement @ $160.

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Old 05-03-2019, 05:23 PM
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Originally Posted by bentonmike View Post
...one quick question that you guys might know off hand, my mechanic has a super scanner, is this something that can be checked with it?
Thanks again for all of the great info!
bentonmike- It can't hurt to try a scanner, especially if it is done for free, but I wouldn't be optimistic. I have a Star Diagnostic System now, but I didn't back when the Red Battery Warningoccured. I am not confident that it would have helped beyond just reporting the error. CPDay
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Old 05-07-2019, 12:46 PM
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It looks like all the V4 batteries come out of the same factory.
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